/*
 * Copyright (c) JForum Team
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
 * that the following conditions are met:
 * 
 * 1) Redistributions of source code must retain the above 
 * copyright notice, this list of conditions and the 
 * following  disclaimer.
 * 2)  Redistributions in binary form must reproduce the 
 * above copyright notice, this list of conditions and 
 * the following disclaimer in the documentation and/or 
 * other materials provided with the distribution.
 * 3) Neither the name of "Rafael Steil" nor 
 * the names of its contributors may be used to endorse 
 * or promote products derived from this software without 
 * specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT 
 * HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, 
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 
 * THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE 
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 
 * IN CONTRACT, STRICT LIABILITY, OR TORT 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
 * 
 * Created on Jan 18, 2005 4:06:08 PM
 * The JForum Project
 * http://www.jforum.net
 */
package net.jforum.view.forum.common;

import java.io.BufferedInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import net.jforum.exceptions.ForumException;
import net.jforum.util.legacy.commons.fileupload.FileItem;

/**
 * @author Rafael Steil
 * @version $Id: UploadUtils.java,v 1.15 2007/07/28 14:17:09 rafaelsteil Exp $
 */
public class UploadUtils {
    private FileItem item;
    private String extension = "";

    public UploadUtils(FileItem item) {
	this.item = item;
    }

    public String getExtension() {
	if (this.extension == null || this.extension.equals("")) {
	    this.extension = this.item.getName().substring(
		    this.item.getName().lastIndexOf('.') + 1);
	}

	return this.extension;
    }

    public void saveUploadedFile(String filename) {
	BufferedInputStream inputStream = null;
	FileOutputStream outputStream = null;

	try {
	    inputStream = new BufferedInputStream(this.item.getInputStream());
	    outputStream = new FileOutputStream(filename);

	    int c;
	    byte[] b = new byte[4096];
	    while ((c = inputStream.read(b)) != -1) {
		outputStream.write(b, 0, c);
	    }
	} catch (IOException e) {
	    throw new ForumException(e);
	} finally {
	    if (outputStream != null) {
		try {
		    outputStream.flush();
		    outputStream.close();
		} catch (IOException e) {
		}
	    }

	    if (inputStream != null) {
		try {
		    inputStream.close();
		} catch (IOException e) {
		}
	    }
	}
    }
}
